Exception Chaining for Better Debugging

Snippet

Exception Chaining for Better Debugging

Exception chaining allows you to wrap a low-level exception (like IOException) into a higher-level business exception while preserving the original cause. This keeps the stack trace intact for debugging.

snippet.java
java
public void loadConfig() throws DataException {
    try {
        Files.readAllLines(Paths.get("config.txt"));
    } catch (IOException e) {
        throw new DataException("Configuration file missing", e);
    }
}

Breakdown

catch (IOException e)

Catches the specific technical error that occurred.

throw new DataException(..., e);

Throws a new exception, passing 'e' as the cause so the root error is not lost.

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Exception Chaining for Better Debugging

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